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 Wysłany: Pon 16:27, 06 Gru 2010 Temat postu: tory burch sale TV transmitter working principle o |
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TV transmitters and working principle of technological improvements
Coaxial position switch to B bits, B position switch contact closure, while receiving the transmitting antenna 2 # machine (2 # machine into a host, a second machine to prepare machine). After the total power on the +24 V power generated by the JX1-18 JX-10-B of a position switch contact a JX-9 a J2A of 1,11 feet, the J2A work (pull), the contacts 5,6 connected to the automated output of the drive signal voltage to the voltage channel J2B. When the digital clock to half past six to twelve, the drive circuit output +24 V voltage is applied to J2B of 1,11 feet, so J2B work (pull), the 5,6 junction connected to the machine start button # 2 to complete 2 machine automatic timing boot task (1 blue machine to prepare machine into standby). 3. Conclusion on technical improvements of television transmitters, to achieve the transmitter automatically boot time, shutdown and alarm, manual reduction of insecurity and can not leave on time,[link widoczny dla zalogowanych], off the man-made accidents, improve safety and high quality broadcast rates: implementation Automatic Turning TV transmitter on time, reducing equipment run time to extend the life of the equipment, reducing the loss of power D-type 10kW TV Transmitter by 95 after the transformation, the total power from the turn on the TV transmitter to the two Internet-based TV transmitter unit conversion equipment available in case of unattended auto-complete, which was further improved to achieve full unattended, remote operation of the foundation. References [1] Kang Huaguang. Electronic Technology [M]. Beijing: Higher Education Press, 1999. [2] Qin Zeng Huang. Electrical engineering (the) [MJ. Beijing: Island Education Press, 1993, [3] more Salong,[link widoczny dla zalogowanych], Huang Tiexia TV principle [Mj Beijing: National Defence Industry Press, 1981 ■ (on the next page 19) can be seen from Figure 2, the frequency divider Characteristics of the standard test requirements. Because of the surge (shock) wave parameters less demanding on the bandwidth of the oscilloscope,[link widoczny dla zalogowanych], the input impedance of the wave with 1MO time and a half before the peak time for testing, little effect on the measurement results. In addition to the discharge point of the entire system, all of the connections use shielded cables, which can effectively isolate the outside signal interference. In addition, measuring the input impedance of the oscilloscope and the voltage divider, the output impedance by adjusting the voltage divider so that the calibration system of connected points can be very close to the 1000:1 compression ratio, the precision can reach 0.1% (point in lkV tests carried out) or less. DC voltage divider and then decline of the discharge voltage of 1kV Table 1, when the coefficient of ten measurements were detected by the measurement results is less than 0.018% / kV. It can be concluded: the school can achieve lightning surge Barebone simulator calibration requirements. 3. Results of the calibration system using a combination of the wave generator to measure the open circuit output voltage to lkV point, for example,[link widoczny dla zalogowanych], ten times repeated measurements, the measurement results shown in Table 1. Based on the above measurements, the voltage divider, digital oscilloscope measurement error itself, several factors such as measurement repeatability uncertainty components introduced by the analysis, synthesis, and ultimately come to the expanded uncertainty of measurement results. Peak voltage divider by l23456789lfJ 1.00510081.0051.0051.0081.005l0 (18l008l0 (151.005 (kV) wave front time 1.1861.1861.1891.I861.I891.1921.192ll82ll891.186 (, us ) between half-peak 48.8448.6848.8048.7648.9048.82487448.8248.6848.86 (\is the smallest of three main components, according to the technical parameters of digital oscilloscope and measuring the results of our alignment system can be calculated into the expanded uncertainty less than 2%, the system meet the standards. 4. Conclusions from the school's Barebone Measurement results can be seen that the system has frequency bandwidth, high precision,[link widoczny dla zalogowanych], the test is convenient, reliable, and strong anti-interference ability a number of advantages, the real play of the lightning surge simulator can be calibrated to the effect that a field can be measured widely used system. References [1] Xiao Ruquan, high voltage test projects PROCEEDINGS Tsinghua University Press, 2 (1 (Il [2] Wen Yuanfang. High Voltage Engineering, Huazhong University of Science and Technology Press (Huazhong University of Science Press) .2 (101 [3] GB/T17626.5-1999 electromagnetic compatibility test and measurement technology surge (the impact) immunity test .1999 ■ ring
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